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How to get rid of global variables gl_args and gl_hashType, while preserving all the functionality of the program. Hint: Use python to add arguments and return values to functions to pass the necessary variables in and out.

How to get rid of global variables gl_args and gl_hashType, while preserving all the functionality of the program. Hint: Use python to add arguments and return values to functions to pass the necessary variables in and out.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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How to get rid of global variables gl_args and gl_hashType, while preserving all the functionality of the program.
Hint: Use python to add arguments and return values to functions to pass the necessary variables in and out.

def ParseCommandLine(): parser = argparse. ArgumentParser('Python file system hashing p-fish') parser.add_argument ('-v', "--verbose", help="allows progress messages to be displayed", action='store_true') # setup a group where the selection is mutually exclusive and required. group = parser.add_mutually_exclusive_group (required=True) group.add_argument('--md5' help = 'specifies MD5 algorithm', group.add_argument('--sha256' help = 'specifies SHA256 algorithm', group.add_argument('--sha512', action='store_true') action='store_true') action='store_true') group.add_argument ('--sha224' help = 'specifies SHA512 algorithm', help = 'specifies SHA224 algorithm' action='store_true') group.add_argument ('--sha384', help = 'specifies SHA384 algorithm', action='store_true') parser.add_argument ('-d', '--rootPath', type= ValidateDirectory, required=True, help="specify the root path for hashing") parser.add_argument ('-r', '--reportPath', type= ValidateDirectorywritable, required=True, help="specify the path for reports and logs will be written") global gl_args global gl_hashType gl_args = parser.parse_args() if gl_args.md5: gl_hashType = 'MD5' elif gl_args.sha256: gl_hashType = 'SHA256' elif gl_args.sha512: gl_hashType = 'SHA512' elif gl_args.sha224: gl_hashType = 'SHA224' elif gl_args.sha384: gl_hashType = 'SHA384' " # create a global object to hold the validated arguments, these will be available then # to all the Functions within the _pfish.py module else: " return gl_hashType = "Unknown" logging.error('Unknown Hash Type Specified') DisplayMessage("Command line processed: Successfully")
Transcribed Image Text:def ParseCommandLine(): parser = argparse. ArgumentParser('Python file system hashing p-fish') parser.add_argument ('-v', "--verbose", help="allows progress messages to be displayed", action='store_true') # setup a group where the selection is mutually exclusive and required. group = parser.add_mutually_exclusive_group (required=True) group.add_argument('--md5' help = 'specifies MD5 algorithm', group.add_argument('--sha256' help = 'specifies SHA256 algorithm', group.add_argument('--sha512', action='store_true') action='store_true') action='store_true') group.add_argument ('--sha224' help = 'specifies SHA512 algorithm', help = 'specifies SHA224 algorithm' action='store_true') group.add_argument ('--sha384', help = 'specifies SHA384 algorithm', action='store_true') parser.add_argument ('-d', '--rootPath', type= ValidateDirectory, required=True, help="specify the root path for hashing") parser.add_argument ('-r', '--reportPath', type= ValidateDirectorywritable, required=True, help="specify the path for reports and logs will be written") global gl_args global gl_hashType gl_args = parser.parse_args() if gl_args.md5: gl_hashType = 'MD5' elif gl_args.sha256: gl_hashType = 'SHA256' elif gl_args.sha512: gl_hashType = 'SHA512' elif gl_args.sha224: gl_hashType = 'SHA224' elif gl_args.sha384: gl_hashType = 'SHA384' " # create a global object to hold the validated arguments, these will be available then # to all the Functions within the _pfish.py module else: " return gl_hashType = "Unknown" logging.error('Unknown Hash Type Specified') DisplayMessage("Command line processed: Successfully")
def DisplayMessage (msg): if gl_args. verbose: print (msg) return
Transcribed Image Text:def DisplayMessage (msg): if gl_args. verbose: print (msg) return
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